The effects of symptomatic therapies such as modafinil and donepezil are inconsistent. Most studies yielding positive findings have significant methodological difficulties limiting the confidence in making any broad treatment recommendations. There are no published reports of glatiramer acetate, natalizumab and fingolimod being effective in improving cognition in controlled trials. The effects of disease modifying therapies in other forms of MS and clinically isolated syndrome have not yielded positive results. Data linking behavioural therapy, symptomatic treatment or disease modifying treatment, to either reducing cognitive decline or improving impaired cognition are limited and inconsistent. The treatment and prevention of cognitive impairment needs to remain a key research focus, identifying new interventions and improving clinical trial methodology.
"In addition to progressive MS symptomatic treatments on the next frontier in improving the live of MSers. Top of the pile are fatigue and cognitive impairment. Both of these problems are the main driver of early disability in MSers, these manifest in the unemployment rate and inter-personal relationship breakdowns that are much higher than you would expect for the level of physical disability. We need to focus on the hidden symptoms of MS if we are to make inroads into the socioeconomic impact of this disease."